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package javax.xml.bind.annotation;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

/**
 * 

Maps a package name to a XML namespace.

* *

Usage

*

* The XmlSchema annotation can be used with the following program * elements: *

    *
  • package
  • *
* *

* This is a package level annotation and follows the recommendations * and restrictions contained in JSR 175, section III, "Annotations". * Thus the usage is subject to the following constraints and * recommendations. *

    *
  • There can only be one package declaration as noted in JSR * 175, section III, "Annotations".
  • *
  • JSR 175 recommends package-info.java for package level * annotations. JAXB Providers that follow this recommendation * will allow the package level annotations to be defined in * package-info.java. *
* *

Example 1: Customize name of XML namespace to which * package is mapped.

* *
 *    @javax.xml.bind.annotation.XmlSchema (
 *      namespace = "http://www.example.com/MYPO1"
 *    )
 * {@code   
 * 
 *    
 *    
 *    
 * }
* *

Example 2: Customize namespace prefix, namespace URI * mapping

* *
 *    // Package level annotation
 *    @javax.xml.bind.annotation.XmlSchema (
 *      xmlns = { 
 *        @javax.xml.bind.annotation.XmlNs(prefix = "po", 
 *                   namespaceURI="http://www.example.com/myPO1"),
 *
 *        @javax.xml.bind.annotation.XmlNs(prefix="xs",
 *                   namespaceURI="http://www.w3.org/2001/XMLSchema")
 *      }
 *    )
 * {@code
 * 
 *    
 *    
 * 
 * }
* *

Example 3: Customize elementFormDefault

*
 *    @javax.xml.bind.annotation.XmlSchema (
 *      elementFormDefault=XmlNsForm.UNQUALIFIED
 *      ...
 *    )
 * {@code
 * 
 *    
 *    
 * 
 * }
* @author Sekhar Vajjhala, Sun Microsystems, Inc. * @since 1.6, JAXB 2.0 */ @Retention(RUNTIME) @Target(PACKAGE) public @interface XmlSchema { /** * Customize the namespace URI, prefix associations. By default, * the namespace prefixes for a XML namespace are generated by a * JAXB Provider in an implementation dependent way. */ XmlNs[] xmlns() default {}; /** * Name of the XML namespace. */ String namespace() default ""; /** * Namespace qualification for elements. By default, element * default attribute will be absent from the XML Schema fragment. */ XmlNsForm elementFormDefault() default XmlNsForm.UNSET; /** * Namespace qualification for attributes. By default, * attributesFormDefault will be absent from the XML Schema fragment. */ XmlNsForm attributeFormDefault() default XmlNsForm.UNSET; /** * Indicates that this namespace (specified by {@link #namespace()}) * has a schema already available exeternally, available at this location. * *

* This instructs the JAXB schema generators to simply refer to * the pointed schema, as opposed to generating components into the schema. * This schema is assumed to match what would be otherwise produced * by the schema generator (same element names, same type names...) * *

* This feature is intended to be used when a set of the Java classes * is originally generated from an existing schema, hand-written to * match externally defined schema, or the generated schema is modified * manually. * *

* Value could be any absolute URI, like {@code http://example.org/some.xsd}. * It is also possible to specify the empty string, to indicate * that the schema is externally available but the location is * unspecified (and thus it's the responsibility of the reader of the generate * schema to locate it.) Finally, the default value of this property * {@code "##generate"} indicates that the schema generator is going * to generate components for this namespace (as it did in JAXB 2.0.) * *

* Multiple {@link XmlSchema} annotations on multiple packages are allowed * to govern the same {@link #namespace()}. In such case, all of them * must have the same {@link #location()} values. * * *

Note to implementor

*

* More precisely, the value must be either {@code ""}, {@code "##generate"}, or * * a valid lexical representation of {@code xs:anyURI} that begins * with {@code :}. * *

* A schema generator is expected to generate a corresponding * {@code } (or * no {@code schemaLocation} attribute at all if the empty string is specified.) * However, the schema generator is allowed to use a different value in * the {@code schemaLocation} attribute (including not generating * such attribute), for example so that the user can specify a local * copy of the resource through the command line interface. * * @since 1.6, JAXB 2.1 */ String location() default NO_LOCATION; /** * The default value of the {@link #location()} attribute, * which indicates that the schema generator will generate * components in this namespace. */ // the actual value is chosen because ## is not a valid // sequence in xs:anyURI. static final String NO_LOCATION = "##generate"; }





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